London Daily

Focus on the big picture.
Saturday, Jul 12, 2025

‘Huge health problem’: BA.2 variant is now dominant globally

‘Huge health problem’: BA.2 variant is now dominant globally

The coronavirus sub-variant accounts for nearly 86 percent of all sequenced cases, according to the WHO.

BA.2, a sub-variant of the Omicron coronavirus variant, has now become dominant globally, representing nearly 86 percent of all sequenced cases, according to the World Health Organization.

First detected in the early days of January, the sub-variant is even more transmissible than its highly contagious Omicron siblings, BA.1 and BA.1.1.

Here’s what we know about BA.2, often referred to as the “stealth variant”.

Why is it called the ‘stealth variant’?


That’s because BA.2 is slightly harder to track.

A missing gene in BA.1 allowed it to be tracked by default through a common PCR test. BA.2 and another sibling, BA.3 – also increasing in prevalence but currently at low levels – can only be found by genomic sequencing.

Even though BA.2 is more infectious than other Omicron sub-variants, according to studies, evidence suggests so far that it is not more likely to cause severe disease.

Are vaccines effective against BA.2?


As with the other Omicron variants, vaccines are less effective against BA.2 than they are against other variants like Alpha or the original strain of coronavirus, and protection declines over time.

However, according to UK Health Security Agency data, protection is restored by a booster jab, particularly for preventing hospitalisation and death.


Can you catch BA.2 if you already had BA.1?


A key concern about BA.2 was whether it could re-infect people who had already had BA.1, particularly as a number of countries seemed to be experiencing “double peaks” in infection rates surprisingly close together.

But data from the UK and Denmark shows that while Omicron can reinfect people who had other variants, such as Delta, only a handful of BA.2 reinfections in people who had BA.1 have been found so far among tens of thousands of cases.

Scientists say a possible explanation for the recent rise in BA.2 could be that many countries have lifted public health interventions.

“In some ways, it could just be that BA.2 was the variant that was circulating when all these people stopped wearing masks,” said Dr Andrew Pekosz, a virologist at the Johns Hopkins Bloomberg School of Public Health.

Eric Topol, director of the Scripps Research Translational Institute, said it was “a little too early” to call whether the US too would see a significant BA.2 wave.

But whatever the reason for BA.2’s rise, scientists say it is a reminder that the virus continues to cause harm, particularly among unvaccinated, under-vaccinated and vulnerable populations.

“It is still a huge public health problem and it is going to continue to be,” said Mark Woolhouse, an epidemiologist at the University of Edinburgh.


Newsletter

Related Articles

0:00
0:00
Close
Reparations argument crushed
Rainmaker CEO Says Cloud Seeding Paused Before Deadly Texas Floods
A 92-year-old woman, who felt she doesn't belong in a nursing home, escaped the death-camp by climbing a gate nearly 8 ft tall
French Journalist Acquitted in Controversial Case Involving Brigitte Macron
Elon Musk’s xAI Targets $200 Billion Valuation in New Fundraising Round
Kraft Heinz Considers Splitting Off Grocery Division Amid Strategic Review
Trump Proposes Supplying Arms to Ukraine Through NATO Allies
EU Proposes New Tax on Large Companies to Boost Budget
Trump Imposes 35% Tariffs on Canadian Imports Amid Trade Tensions
Junior Doctors in the UK Prepare for Five-Day Strike Over Pay Disputes
US Opens First Rare Earth Mine in Over 70 Years in Wyoming
Kurdistan Workers Party Takes Symbolic Step Towards Peace in Northern Iraq
Bitcoin Reaches New Milestone of $116,000
Biden’s Doctor Pleads the Fifth to Avoid Self-Incrimination on President’s Medical Fitness
Grok Chatbot Faces International Backlash for Antisemitic Content
Severe Heatwave Claims 2,300 Lives Across Europe
NVIDIA Achieves Historic Milestone as First Company Valued at $4 Trillion
Declining Beer Consumption Signals Cultural Shift in Germany
Linda Yaccarino Steps Down as CEO of X After Two Years
US Imposes New Tariffs on Brazilian Exports Amid Political Tensions
Azerbaijan and Armenia are on the brink of a historic peace deal.
Emails Leaked: How Passenger Luggage Became a Side Income for Airport Workers
Polish MEP: “Dear Leftists - China is laughing at you, Russia is laughing, India is laughing”
BRICS Expands Membership with Indonesia and Ten New Partner Countries
Weinstein Victim’s Lawyer Says MeToo Movement Still Strong
U.S. Enacts Sweeping Tax and Spending Legislation Amid Trade Policy Shifts
Football Mourns as Diogo Jota and Brother André Silva Laid to Rest in Portugal
Labour Expected to Withdraw Support for Special Needs Funding Model
Leaked Audio Reveals Tory Aide Defending DEI Record
Elon Musk Founds a Party Following a Poll on X: "You Wanted It – You Got It!"
London Stock Exchange Faces Historic Low in Initial Public Offerings
A new online platform has emerged in the United Kingdom, specifically targeting Muslim men seeking virgin brides
Trump Celebrates Independence Day with B-2 Flyover and Signs Controversial Legislation
Boris Johnson Urges Conservatives to Ignore Farage
SNP Ordered to Update Single-Sex Space Guidance Within Days
Starmer Set to Reject Calls for Wealth Taxes
Stolen Century-Old Rolls-Royce Recovered After Hotel Theft
Macron Presses Starmer to Recognise Palestinian State
Labour Delayed Palestine Action Ban Over Riot Concerns
Swinney’s Tax Comments ‘Offensive to Scots’, Say Tories
High Street Retailers to Enforce Bans on Serial Shoplifters
Music Banned by Henry VIII to Be Performed After 500 Years
Steve Coogan Says Working Class Is Being ‘Ethnically Cleansed’
Home Office Admits Uncertainty Over Visa Overstayer Numbers
JD Vance Questions Mandelson Over Reform Party’s Rising Popularity
Macron to Receive Windsor Carriage Ride in Royal Gesture
Labour Accused of ‘Hammering’ Scots During First Year in Power
BBC Head of Music Stood Down Amid Bob Vylan Controversy
Corbyn Eyes Hard-Left Challenge to Starmer’s Leadership
London Tube Trains Suspended After Major Fire Erupts Nearby
×